Photovoltaic Inverter Output Current Research of Adaptive Active Harmonic Compensation Device

With the continuous improvement of photovoltaic power generation technology, people has higher requirement on the performance of the photovoltaic inverter. Currently, PV Inverter Grid process of the home and abroad, because the inverter put DC power into AC power frequency electric use the inverter principle and PWM control technology inevitably produce harmonics problems at the sine wave inverter formed. According to this kind of harmonic interference problem, the adaptive in-place active harmonic compensation technology were proposed, this effectively suppress the harmonic pollution to power network, solved the PV inverter output harmonic and reactive power problems, effective purification of power grid, filled the domestic and foreign photovoltaic inverter without output current harmonic compensation gap.

ANALYSIS OF ACTIVE HARMONIC COMPENSATION ALGORITHMS FOR GRID-CONNECTED PHOTOVOLTAIC INVERTERS / AKTYVUSIS HARMONIKŲ KOMPENSAVIMAS SAULĖS ELEKTRINIŲ TINKLO INVERTERIAIS – ALGORITMŲ ANALIZĖ

A review of various standards, concerning distributed generation, and different Active Harmonic Compensation (AHC) or Active Power Filtering (APF) methods are presented in this paper. Short overview of each control method is given. The experimentation results from various publications are taken into account evaluating the feasibility of an AHC algorithm to be integrated in a typical commercially available grid-connected Photovoltaic inverter. The comparison results are presented in a table. The results of this paper can be used for further investigation in deciding which particular algorithm to try to implement and experiment with. Pateikta standartų, taikomų paskirstytosioms elektrinėms jungti į žemos įtampos elektros skirstomuosius tinklus, apžvalga. Išnagrinėtas aktyvusis harmonikų kompensavimo (AHK) aspektas, esantis šiuose standartuose. Pateikti harmonikų limitai, kuriuos turi atitikti jungiamos į žemos įtampos elektros tinklą paskirstytosios elektrinės. Apžvelgti skirtingi AHK metodai, pateikta kiekvieno algoritmo analizė. Atsižvelgiant į galimybę AHK įgyvendinti šiuo metu komerciškai gaminamuose saulės elektrinių tinklo inverteriuose (SETI), tarpusavyje palyginti skirtingi AHK pagal algoritmų skaičiavimo intensyvumą, daviklių skaičių, topologiją, maksimaliai kompensuojamų harmonikų skaičių ir priklausomybę nuo apkrovos tipo.